How much power do i need?

[baller43]

i am going to crossfire 2 5750s. How much power do i need?

 

[AxemanACL]

Copy paste from AMD's website.

450 Watt or greater power supply with one 75W 6-pin PCI Express® power connectors recommended (600 Watt and two 6-pin connectors for ATI CrossFireX™ technology in dual mode)


So 600W

 

[amuffin]

A quality 500w unit. Corsair cx500w is a great cheap unit.

 

[tlmck]

This one will also do it, and allow for a little upgrade room should you decide on higher end cards. Mine has been stellar so far(3 months), and it just happens to be a great deal right now with the rebate which I had no trouble getting. http://www.newegg.com/Product/Product.aspx?Item=N82E16817341017

 

[baller43]

i have like a 100 watt cpu that i am going to be getting though. thanks though,

 

[amuffin]

A 500w unit.

 

[Deleted member 217926]

Copy paste from AMD's website.

450 Watt or greater power supply with one 75W 6-pin PCI Express® power connectors recommended (600 Watt and two 6-pin connectors for ATI CrossFireX™ technology in dual mode)


So 600W

^ This is straight from the AMD site.


I would NOT use a 500w PSU with 600w being recommended. That would be a generic 600 watt unit but I would not risk a 500w unit as was recommended above. Also that OCZ linked to is a decent power supply but you can do better for the same money.

http://www.eggxpert.com/forums/thread/323050.aspx

Try this.

http://www.newegg.com/Product/Product.aspx?Item=N82E16817151096

 

[jsc]

A good 500 watt PSU will do nicely. A pair of 5750's will pull about 150 watts (12 - 13 amps) at load.

One of my systems has an OC'd Q9550, 4 GB RAM, a GTX260 - a card with similar power requirements to two 5750's, a Gigabyte EP45-UD3P motherboard, 3 hard drives (2.6 TB total)and an optical, and a Soundblaster card all powered by a Corsair 750TX.

Running 3 instances of Prime95 to load the CPU and 3DMark06 to load the GPU, it pulls 375 watts from the wall as measured by my Kill-a-Watt meter. Figuring 80% PSU efficiency, the system pulls 300 watts from the PSU.

 

[alrobichaud]

Scroll down the page to the power consumption section. These guys are using a 130W cpu and they have it overclocked so it is drawing more than that. With crossfire 5750's they measured a peak of 425W. Though they do recommend a 600W power supply(the same as AMD). Things will probably work just fine with a quality 500W so if you have one already then stick with it. If not, then just get what AMD recommends.

http://www.guru3d.com/article/radeon-hd-5750-review-crossfirex/10

 

[baller43]

so then 600w should work fine 400-500w for the gpus, and 100w for the cpu.

ill probably try to get a around a 675w psu so i have extra room in case i want to overclock.

 

[alrobichaud]

A little headroom is always nice and I would get ,at the minimum, what the manufacturer recommends.

 

[baller43]

Best answer selected by baller43.

 

[Mousemonkey]

This topic has been closed by Mousemonkey